// Copyright (c) 2018-present Baidu, Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include "rocks_wrapper.h"

namespace baikaldb {
class MetaRocksdb {
public:
    virtual ~MetaRocksdb() {}
    
    static MetaRocksdb* get_instance() {
        static MetaRocksdb _instance;
        return &_instance;
    }

    int init(); 
    int put_meta_info(const std::string& key, const std::string& value);
    int put_meta_info(const std::vector<std::string>& keys,
                        const std::vector<std::string>& values);
    int delete_meta_info(const std::vector<std::string>& keys);
    int write_meta_info(const std::vector<std::string>& put_keys,
                       const std::vector<std::string>& put_values,
                       const std::vector<std::string>& delete_keys);
    
private:
    MetaRocksdb() {}
    
    RocksWrapper* _rocksdb = NULL;
    rocksdb::ColumnFamilyHandle* _handle = NULL;
}; //class

}//namespace baikaldb

/* vim: set expandtab ts=4 sw=4 sts=4 tw=100: */
